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Old 08-24-2013, 08:51 AM   #1
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Best Throttle Body to purchase?

Hey guys, I've had my automatic 04 Mustang GT for a little over a year now and I'm starting to put some mods on it. The mods I have so far are:
-2" lowering kit
-BBK CAI
-BBK Pullie System
-4.10 gears
-Diablo Sport Predator Tuner

I took it out to the track for the first time and got a 9.1 in the 1/8 and a 13.98 in the 1/4. I'm very proud of that time because I thought I was going to get mid 14s. The thing is that after the 1/8 since I have an automatic, I would loose some ground which makes me want to buy a throttle body so I can improve in that area. I was wondering, what is the best throttle body setup? I know there's the link that shows good bolt-ons for beginners but I wanted to ask y'all. People on here say you'll gain the best hp with a 70mm TB if you don't plan to turbo your Mustang but my friends in town are saying the bigger it is the better. As of right now I'm just going to say that I don't want to turbo it. Just add some bolt-ons basically.
So my question is, what mm TB should I buy and what is the best set-up for it? Thanks!
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Old 08-24-2013, 09:08 AM   #2
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a 70mm would be best but i wouldnt mind going with a 75mm . i think the 78mm is too much though if ur not gona put boost or a blower
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Old 08-24-2013, 09:12 AM   #3
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a 70mm would be best but i wouldnt mind going with a 75mm . i think the 78mm is too much though if ur not gona put boost or a blower
Why is a bigger mm than 75 bring down the hp since its more airflow going through the car?
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Old 08-24-2013, 09:47 AM   #4
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Originally Posted by Horseplay View Post
a 70mm would be best but i wouldnt mind going with a 75mm . i think the 78mm is too much though if ur not gona put boost or a blower
Personally I would have to say if 78 is to big so is 75.. 3 mm is pretty small.
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Old 08-24-2013, 10:17 AM   #5
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Check out Cliffy's beginners guide to bolt-ons for charts showing the different air flow you get from throttlebody and plenum upgrades. The reason to not go above 70mm is because you start losing air velocity because the throttlebody is too big.
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Old 08-24-2013, 10:23 AM   #6
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Originally Posted by TheTumbler04 View Post

Why is a bigger mm than 75 bring down the hp since its more airflow going through the car?
http://www.cnlperformance.com/produc...bid=17&catid=3

this site has sum good info on the subject

---------- Post added at 10:23 AM ---------- Previous post was at 10:22 AM ----------

and if ur gona change ur tb, i would also change ur plenum. it would work out better in the end
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Old 08-24-2013, 10:51 AM   #7
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I bought the bbk 78mm throttle intake and have no complaints. Some say its over kill but considering the price and different reviews I read I was hooked. Plus big gains come from heads-cams-forced induction etc ....so in reality I don't see all the fus between a few mm. Buy it and never look back
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Old 08-24-2013, 09:24 PM   #8
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Hey you might want to check out this link.

http://www.allfordmustangs.com/forum...-charts-5.html

Personally, I got a 75mm accufab with a c&l plenum no complaints. I say it was worth it n my car drove like a beast after lol.


Here's my old one:



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And here's the new one




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Old 08-24-2013, 09:25 PM   #9
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Sorry I forgot to add the plenums too:




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Old 08-24-2013, 10:34 PM   #10
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I'm not am auto guy, but if I were you I'd get either a shift kit (although your tuner can probably do that) and a performance torque converter. That would really wake your car up in the 1/4. Just my .02
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Old 08-27-2013, 12:32 PM   #11
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Originally Posted by Bee20e View Post
Sorry I forgot to add the plenums too:
I wish there was an aftermarket plenum with the pony on it like the stock plenum.. I think the pony really makes our ugly 4.6 engines a little bit better looking
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Old 08-27-2013, 02:01 PM   #12
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TheTumbler04,

There's a lot of good options for intake plenums and TB's. Lots of people have different opinions of which size is better too. Personally, I recommend the BBK 78mm TB/Plenum for your GT.

Now, I don't want to give you the wrong impression, bigger is not always better. However, the BBK 78mm TB/Plenum has worked very well on every 2v GT I've seen sporting it. We even equipped our own N/A '00 GT with the same combo and saw significant gains throughout the entire power curve! Plus, another very attractive feature of this setup is the price. You'll save just about half the cash it would cost you to run an Acufab TB & upper, while both options yield similar results.

You can check out a video of our '00 GT on the dyno at the link below. I think you'll be very impressed with the overall HP/TQ gains shown on our in house DynoJet 224xLC. Also, if you have any more questions, feel free to ask me. I'd be happy to help anyway possible!

Shane

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